I read a nice post here  from Long Zheng who got two copies of the new book Ajax with ASP.NET  you can win, read his blog.
The book is a great help on how to start with AjaxPro. There are a couple of examples available that will help you. If you have questions concerning the examples use the Google group  that has already about 4.000 members!!
On my web page http://www.ajaxpro.info/  you will find a special offer discount for all Ajax books that cover Ajax.NET.
I will give some copies away on next DodNed  Franken User Group meeting.